Balancing device for reciprocating engines.



F. W. LANCHESTER. BALANCING DEVICE FOR RECIPROCATING ENGINES.

APPLICATION FILED JAN.3I| I913.

Patented M014, 1915.

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APPLICATION FILED JAN.'3I. 1913. 1 1mm? Patenmd; Dec.14,1915.

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M 5 mwmmw JC.%I/ ham/A, MMQW "L S AWWMWEW FREDERICK WILLIAM LANCHEST ER, 01E BIINGHAM, ENG 1 l BALANCING DEVICE FOR RECIPROCATING ENGINES.

Specification of Le tters Patent.

Patented Dec. M T915.

Application filed January 31, 1913!. Serial No. 74:5,4l93. I

To all whom it may concern:

Be it known that I, FREDERICK WILLIAM LAN CHESTER, a subject of the King of Great Britain and Ireland, and residing-at Edgbaston, Birmingham, in the county of Warwick, England, have invented certain new and useful Improvements Relating to Balancing Devices for Reciprocating Engines, of which the following is a specification.

The present invention relates to the balancing of reciprocating engines, and has for its object to provide improved means for balancing the linear vibration due to connecting rod angularity.

In the application for Letters Patent Serial No. 728,881 there are described various devices for eliminating secondary vibrations in reciprocating engines, and in such arrangements, according to some modifications, the linear vibration due to the cons necting rod angularity is balanced by means of two oppositely rotating weights having reciprocating engines hereinafter described.-

Referring to the accompanying drawings, Figure l is a transverse section at rlght angles to the crank shaft showing one modifi-.

cation of the invention; Fig. 2 is a section in a plane at right angles to the plane of Fig. l on the line XX, the left-hand portion of the figure being a section on the line AB Fig. 1; Fig. 3 is a perspective view showing the form of the weight used in the modification shown in Figs. 1 and 2; Fig. 4 is a section at right angles to the crankshaft of another modification of the invention. Fig. 5 being a cross section on the line AAA Fig. 4, while Fig. 6 is a sectional elevation on the line ZZ Fig.4.

In the form of the invention illustrated in Figs. 1, 2 and 3, a bracket a is carried by the engine casing, and in this bracket there are fixed-"shafts b k provided with white metal bearings c on which rotate weight-carrying members or carriers (1. These members are filled in at their central portion, having a section as shown on the right-hand side of Fig. 2, a number of circular apertures e being pierced through the central portion. 0n the outside of the central portion there is also formed a spiral gear wheel f. The section of the carriers at their ends is in the form of two cylinders with an open annulus between them, and half of this annulus is filled in with lead 1', which is cast into the carrier, the form of the lead when in position being as shown in Fig. 3. A spiral gear wheel g is fixed on the crankshaft Ii and gears with one of the gear wheels 7 on one of the carriers, and this gears with the other carrier, so that the two rotate in op osite directions carrying their weights with them "at twice crankshaft speed. The direction of motion is-preferably such that the teeth in "contact on the two carriers are moving in the upward direction so that dirt is prevented from entering between the teeth of the two sleeves.

In the form of the invention illustrated at weights arranged as above described, the

linear vibration due to connecting rod angularity may be balanced.

Having now described my invention, what I claim as new and desire to secure by Letters Patent is 1. In a reciprocating engine, means for balancing secondary" vibrations comprising in combination, two hollow carriers, means for rotatably carrying said carriers on the engine frame, meansfor rotating said carriers in opposite directions, at twice crank shaft speed, and eccentrically arranged weights fixed in said carriers, as set forth;

2. In a reciprocating engine, means for balancing secondary vibrations, comprising in combination, bearings fixed to the engine frame, two spindles carried by said beardles, a weight cast eccentrically in each of sleeves at twice crank shaft speed, as set B r v 1,104,307

ings, a. sleeve, mounted on earth of said spin- In testimony whereof, I afiix my signature d l h 15 d in presence of two witnesses. sai sleeves and spira w ee mounte 'on r said sleeves: and geared to the crank shaft, v FREDERICK WILLIAM LANGHESTER' 5 said gears being arranged to drive said Witnesses:

BERTRAM H.- MATTHEWS,

forth; E. C. WALKER. 

